First, you have to do your vanilla bio. I might write something like: “Wakefield Mahon is a freelance writer, poet, and author of Wakefieldisms, the writer’s inspiration blog. His stories have appeared in publications by Folded Press, Softcopy Publishing and Living Dead Press. His latest project is the Way of the Sword fantasy series. The first book, Emerald Dreams will be published next year.” Remember, even if this is your first story, you can still say “Jane Smith is a freelance writer.” Teaching credentials and writer’s association affiliation may also be appropriate.
Some editors may allow or even encourage bios that are more interesting. Here is your chance to shine. You do not have to use the same bio for every publication. While my faith might be very relevant to an article in an inspirational magazine, it is probably of less interest to the readers of my dark fiction and horror stories. Depending on the market, you might want to use something quirky, silly, or deep. Check with your editor first. When it doubt, always revert to your vanilla bio.